Blast furnace



JKENNEDY BLAST FURNACE Filed July 2 1925 Patented Sept. 7, lhiltil UNITED STATES JULIAN KENNEDY, OF PITTSBURGH, PENNSYLVANIA.

BLAST FURNACE.

Application filed July 2,

The present invention relates to blast furnaces and more particularly to the adjustment of the little bell hopper.

In blast furnaces the big bell is commonly supported by a rod which extends through the hollow supporting rod of the little bell. lVhen the big bell is lowered the little bell is drawn against its hopper so that the 1101- low rod of the little bell serves in the nature of a guide for the rod of the big bell. Ordinarily there is quite a loose fit between the rod of the big bell and the hollow rod of the little bell so that more or less sidewise movement is permitted to the big bell. In order to center the big bell, I provide for a lateral adjustment of the hopper of the little bell which in turn serves to laterally adjust the little bell and its rod. In order to provide for a more accurate positioning of the big hell I prefer to make a relatively snug sliding fit between the rod of the big bell in the hollow rod of the little bell. By thus adjusting the little bell hopper and providing a good guiding fit for the rod of the big bell I am enabled to accurately center the big bell in its hopper.

In the drawings:

Figure 1 is a vertical sectional view showing the preferred embodiment of the invention; and

Figure 2 is a sectional detail view show ing the clamping screw for the little bell hopper.

Referring to the illustrated embodiment of the invention reference numeral 1 indicates the top of a blast furnace which is provided with the usual big hell 2 and its hopper 3, the little bell 4 and its hopper 5. The big bell is supported by its rod 6. The little bell is supported by it rod 7 which is hollow and through which slides the rod 6 of the big bell. The rod 6 preferably has a fairly close sliding fit in the rod 7. As will readily be seen, the position of the big bell in its hopper will be determined by the posi tion of the little bell 1 since the little bell and its rod 7 serve as a guide for the su porting rod 6 of the big bell. The position of the little bell is determined by the position of its hopper 5 against which the little bell is drawn during such times as the big bell is open.

The supporting bearing 8 of the little bell hopper is made laterally adjustable in 1925. Serial No. 41,050.

order to laterally adjust the little bell hopper and consequently the little bell. The bearing 8 has an outwardly projecting flange 9 through which are formed holes 10 to re ceive bolts 11 which are smaller than the holes 10. The bolts 11 are fastened in the internal flange 12 on the top of the hopper 3, the bolts ll having an enlargement 13 bearing against the top of the flange 12 and a holding nut 14. The upper part of the bolt 11 is threaded and is provided with a clamping nut 15 which bears against a Washer 16 over the top of the enlarged hole 10.

As can readily be seen the little hopper bearing 8 can be laterally adjusted by loosening the nuts 15, in order to shift the hopper 5 and the little bell and its rod, and to center the big bell 2 in its hopper 3.

The relatively close sliding fit of the rod 6 of the big bell through the hollow rod 7 of the little hell not only insures an accurate centering of the bell through the adjustment of the little bell hopper, but also serves to hold the big bell in centered position when it is dropped to discharge its rod into the furnace.

W hile I have specifically illustrated and described the preferred embodiment of my invention, it is to be understood that the invention is not limited to its illustrated embodiment but may be otherwise embodied within the scope of the following claims.

claim:

1. A blast furnace comprising a little bell, a bell having a supporting rod passing through the little bell and guided thereby, and means for laterally adjusting the little hell.

2. A blast furnace comprising a little bell, a big bell having a supporting rod passing through the little bell and guided thereby, and means for laterally adjusting the hopper of the little bell to thereby laterally adjust the little bell and the big bell.

3. A blast furnace having a little bell and a hollow supporting rod therefor, a hopper for the little bell, means for laterally adjusting the hopper, a big bell and a supporting rod therefor having a relatively close sliding fit through the rod of the little bell.

In testimony whereof I have hereunto set my hand.

JULIAN KENNEDY. 

